Maximum Power From A 2.5 Neo Na Engine Skyline 25Gt

[Kei_ayanami]

Hi guys just a quick what is the most power you can get from a 2.5 neo engine from the skyline 25gt without going turbo or supercharged and what would kind of price Range are you looking at?
Is it possible to get around 300hp ?

[xALmoN]

not without spending a lot of money.

no.

[fyjosh]

no fkn chance.

[mad082]

If you don't mind spending about 20k on building an engine and then rebuilding it at every oil change then you might get 300hp. But it will drive like crap, use heaps of fuel and be exceptionally unreliable.

[Captain Natro]

Should just by a magna ey Marc

But yer not a hope of going 300hp (even at the flywheel), would need massive compression, huge cams, itbs.... Although, I shot of giggle gas would liven that boiled egg of an engine up

[Deza3000]

300hp is equal to 220kw, something which not even a stock r34 gt-turbo makes.

Anyways that being said, If you are keen on dishing out 5k+ some guy posted on youtube of his n/a r33. Got 140rwkw out of a N/a, which equates to around 200hp at the wheels.
Initially it was making 92rwkw, so considering its 140kw at the fly from facotry it should be: 140-96= 44kw. 140+44 = 184kw at the fly which is 250hp once modded. So if you spend 5k you can get 250hp, not impossible

He lists his mods in the description:

[xALmoN]

for 5k a turbo will see 250rwkw easy.

[Captain Natro]

for 5k a turbo will see 250rwkw easy.

Don't say that, I've spent twice this and only make 270~

[gtr jet]

Just buy an XR6 Turbo. 300rwkw for $3000

[bozodos]

bone stock LS1 will make 300hp, 500 with 'bolt ons'

[zebra]

lighter than a RB25 too

[Deza3000]

For 300hp at the fly; even a VE SIDI sv6 commie will do. Close to 300hp from factory, wooo.

[scotty nm35]

Who the hell measures flywheel horses though, only NA guys.

[Truffles]

Up until the ferarri 458 came out, the F20C in the Honda s2000 was the most powerful naturally aspirated engine per litre in a car and that made approximately 124hp at the flywheel per litre. 248hp with 2.0L . The F20C is a supremely different engine to the Rb25de. the Rb25de was not made for power, that's what the Rb25det was for.

Is it possible to make 300hp from a smaller capacity N/A engine? Yes. Is it possible to make 300hp from an rb25de? Possibly. Can do you it for less then you'd make 500kw from an rb25det? No.

It's definitely not worth you time or money.

[Deza3000]

Who the hell measures flywheel horses though, only NA guys.

Haha yea thats true, but i assumed thats what the OP was referring too. ;p